文件上传 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <form action="/java0209/demo04" method="get">
    用户名<input type="text" name="username">
    <input type="submit" value="提交">
  </form>
</body>
</html>
package com.atping.servlet_;

import org.apache.commons.io.IOUtils;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

@WebServlet("/demo05")
@MultipartConfig
public class HttpServlet05 extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        Part picture = req.getPart("picture");
        String pictureName = picture.getName();
        System.out.println("用户名" + username + "密码" + password + "文件名字" + pictureName);

        //文件具体名字
        String fileName = picture.getSubmittedFileName();
        InputStream inputStream = picture.getInputStream();
        //用绝对路径和相对路径分别演示  /正斜杠单个   //双斜杠两个
//        String imgPath = req.getServletContext().getRealPath("img");

        FileOutputStream outputStream = new FileOutputStream("D:\\代码\\February\\java0209\\web\\img\\"+fileName);
        byte[] bytes = new byte[1024];
        int len = 0;
        while ((len = inputStream.read(bytes)) != -1){
            outputStream.write(bytes,0,len);
        }
//        IOUtils.copy(inputStream,outputStream);
        outputStream.close();

    }
}

 

posted @ 2023-02-09 12:12  阿文程序猿  阅读(26)  评论(0)    收藏  举报